Gigabit ethernet

RouterOS General
1

If two mikrotiks are connected port to port with an ethernet run that tests out to 800Mbps but not 1000,
will they connection at 100, 800 or 1000 but provide only 800?

Thanks Homer, CEO Lightlink Internet.

2

What was the testing topology and devices? How they were set? Are the traffic generators powerful enough? Wasn’t there any MTU problem on the way causing fragmentation?

3

Thanks for responding so fast.

Please try to take the problem at its face value, solutions to the problem may come later.

The wire is a tad too long for gigabit ethernet through a difficult forest, a handhelp TDR ethernet tester says its good to 800Mpbs.

The wire needs to carry more than 100 Mbps but doesn’t need 800, maybe 200 or 300 at very most.

So to start with I just want know what will happen when I use the wire to connect two miks at each end, port 1 to port 1 which are set
to autonegotiate. I haven’t yet actually done the experiment, its a hassle getting at this wire and power is not available yet.

And what happens if I force the wires to 1000 gigabit but they only certifiy to 800 Mbps.

Thanks in advance,

Homer

4

They either negotiate at gigabit or at other speed. And they will follow what was negotiated. If you force anything above, it can simply stop working or behave unexpectedly.

5

Why not deploying a fiber run?

You won’t be limited by distance, S-3553LC20D SFP is good for a single fiber strand for 20km, at $79 (usually less).

6

It’s very rare to see full wire speed unless in a completely perfect environment. This includes things like larger packets, etc..